Regarding the Tanimboca treehouses. They are private. All the programs we sell to the Amazon are in private, therefore, the accommodations as well. Most of the cabins have multiple beds, to make the most of their capacity, but that does not mean that there will be more people outside of your group in the same cabin. They have private bathrooms

room inside of a treehouse

In the ​Marasha Reserve, , the accommodation is also good, they are rooms with good ventilation, some with private bathrooms and others with the bathroom outside (Shared). They are common bathrooms but in very good condition and remain very clean.
And it should be noted that all rooms are private too. 

Marasha reserve cabins

Marasha reserve bedroom

bedroom inside of a treehouse

The accommodation in Puerto Narino is in a regular hotel, with private rooms with private bathrooms. Also a dining room, etc.

Puerto Narino Hotel lobby

Puerto Narino Hotel bedroom